421891254 has 84 divisors (see below), whose sum is σ = 993681276. Its totient is φ = 134270136.

The previous prime is 421891237. The next prime is 421891291. The reversal of 421891254 is 452198124.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 771009 + ... + 771555.

It is an arithmetic number, because the mean of its divisors is an integer number (11829539).

Almost surely, 2^421891254 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421891254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496840638).

421891254 is an abundant number, since it is smaller than the sum of its proper divisors (571790022).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421891254 is an equidigital number, since it uses as much as digits as its factorization.

421891254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 575 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 421891254 is about 20539.9915774082. The cubic root of 421891254 is about 750.0096318763.

The spelling of 421891254 in words is "four hundred twenty-one million, eight hundred ninety-one thousand, two hundred fifty-four".